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Use page size and pg items to calc max image size

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This commit is contained in:
Michael Babienco
2026-03-12 20:58:20 +09:00
parent 25f739667d
commit aed85c7555
1 changed files with 99 additions and 31 deletions
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src/ViewModels/MainViewModel.cs
+99 -31
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@@ -638,6 +638,43 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
return null;
}
private Paragraph GetFooterParagraph()
{
var footerPar = new Paragraph();
footerPar.Format.Alignment = ParagraphAlignment.Center;
footerPar.Format.Font.Size = 10;
footerPar.AddText("--Page ");
footerPar.AddPageField();
footerPar.AddText(" of ");
footerPar.AddNumPagesField();
footerPar.AddText("--");
footerPar.AddLineBreak();
footerPar.AddText("Report generated on " + DateTime.Now.ToString("f"));
footerPar.Tag = "FooterPar";
footerPar.Format.Font.Name = "Noto Sans";
return footerPar;
}
private decimal GetExistingPageItemHeight(PdfDocumentRenderer pdfRenderer, decimal footerParagraphHeight)
{
pdfRenderer.DocumentRenderer.PrepareDocument();
var currPageCount = pdfRenderer.DocumentRenderer.FormattedDocument?.PageCount;
var heightForExistingItemsOnPage = footerParagraphHeight;
if (currPageCount.HasValue)
{
var renderInfo = pdfRenderer.DocumentRenderer.GetRenderInfoFromPage(currPageCount.Value);
if (renderInfo != null)
{
// Console.WriteLine("Got render info for page: {0}", currPageCount);
foreach (var item in renderInfo)
{
heightForExistingItemsOnPage += (decimal)item.LayoutInfo.ContentArea.Height.Inch;
}
}
}
return heightForExistingItemsOnPage;
}
// https://forum.pdfsharp.net/viewtopic.php?f=2&t=1025
private async Task CreatePDF(string folderPath)
{
@@ -649,6 +686,15 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
await DialogHost.Show(new WarningViewModel("Output directory not found! Please adjust your application Settings before continuing. Output directory: " + outputDir));
return;
}
// setup globals and consts...
GlobalFontSettings.FontResolver = this;
GlobalFontSettings.FallbackFontResolver = new FailsafeFontResolver();
const decimal pageWidth = 8.5m;
const decimal pageHeight = 11.0m;
const decimal margin = 0.5m;
const int imageResolution = 72;
const int imageInsertMarginPixels = 30; // we calculate max available; use max - this # for max image size
var maxItemPxWidth = ((pageWidth - (2 * margin)) * imageResolution) - imageInsertMarginPixels;
// start making PDF!
IsCreatingPDF = true;
var pdfDoc = new Document();
@@ -674,11 +720,9 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
LogInfo("Auto-changed output file name to " + outputFileName);
}
}
// setup initial section (for page characteristics)
var section = pdfDoc.AddSection();
section.PageSetup.PageFormat = PageFormat.Letter;
const decimal pageWidth = 8.5m;
const decimal pageHeight = 11.0m;
const decimal margin = 0.5m;
section.PageSetup.PageWidth = pageWidth + "in";
section.PageSetup.PageHeight = pageHeight + "in";
section.PageSetup.TopMargin = margin + "in";
@@ -686,24 +730,41 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
section.PageSetup.BottomMargin = margin + "in";
section.PageSetup.LeftMargin = margin + "in";
// setup footer for page number
var footerPar = new Paragraph();
footerPar.Format.Alignment = ParagraphAlignment.Center;
footerPar.Format.Font.Size = 10;
footerPar.AddText("--Page ");
footerPar.AddPageField();
footerPar.AddText(" of ");
footerPar.AddNumPagesField();
footerPar.AddText("--");
footerPar.AddLineBreak();
footerPar.AddText("Report generated on " + DateTime.Now.ToString("f"));
var footerPar = GetFooterParagraph();
section.Footers.Primary.Add(footerPar);
// add report title
// create a quick PDF doc renderer to measure footer paragraph height
var footerParagraphHeight = 0.4m; // estimate
var footerOnlyPdfDoc = new Document();
var sectionClone = section.Clone();
footerOnlyPdfDoc.Add(sectionClone);
sectionClone.Add(GetFooterParagraph());
var footerPdfRenderer = new PdfDocumentRenderer
{
Document = footerOnlyPdfDoc
};
footerPdfRenderer.DocumentRenderer.PrepareDocument();
var footerRenderInfo = footerPdfRenderer.DocumentRenderer.GetRenderInfoFromPage(1);
if (footerRenderInfo != null)
{
foreach (var item in footerRenderInfo)
{
if (item.DocumentObject.Tag?.ToString() == "FooterPar")
{
Console.WriteLine("Got footer paragraph height!");
footerParagraphHeight = (decimal)item.LayoutInfo.ContentArea.Height.Inch;
break;
}
}
}
// continue setting up document
// First page only: add report title
var reportTitlePar = section.AddParagraph();
reportTitlePar.Format.Alignment = ParagraphAlignment.Center;
reportTitlePar.Format.Font.Size = 16;
reportTitlePar.Format.Font.Bold = true;
reportTitlePar.Format.Font.Name = "Noto Sans JP"; // has english letters in it, too
reportTitlePar.AddText(ReportTitle);
reportTitlePar.Tag = "TitlePar";
// get converted files directory path and create it if necessary
var convertedDir = Path.Combine(Utilities.GetInternalDataPath(), "converted");
if (!Directory.Exists(convertedDir))
@@ -711,8 +772,11 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
Directory.CreateDirectory(convertedDir);
}
//
GlobalFontSettings.FontResolver = this;
GlobalFontSettings.FallbackFontResolver = new FailsafeFontResolver();
var pdfRenderer = new PdfDocumentRenderer
{
Document = pdfDoc,
WorkingDirectory = folderPath
};
var hasAddedData = false;
for (var i = 0; i < ReportFiles.Count; i++)
{
@@ -739,12 +803,14 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
imageTitlePar.Format.Font.Bold = true;
imageTitlePar.Format.Font.Name = "Noto Sans JP"; // has english letters in it, too
imageTitlePar.AddText(string.IsNullOrWhiteSpace(file.Title) ? file.FileName : file.Title);
imageTitlePar.Tag = "ReceiptTitlePar";
var receiptDatePar = section.AddParagraph();
receiptDatePar.Format.Alignment = ParagraphAlignment.Center;
receiptDatePar.Format.Font.Size = 12;
receiptDatePar.Format.Font.Bold = true;
receiptDatePar.Format.Font.Name = "Noto Sans JP"; // has english letters in it, too
receiptDatePar.AddText(file.ReceiptDate.ToString("yyyy-MM-dd"));
receiptDatePar.Tag = "ReceiptDatePar";
if (!string.IsNullOrWhiteSpace(file.Notes))
{
var imageNotesPar = section.AddParagraph();
@@ -753,8 +819,10 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
imageNotesPar.Format.Font.Bold = false;
imageNotesPar.Format.Font.Name = "Noto Sans JP";
imageNotesPar.AddText(file.Notes);
imageNotesPar.Tag = "ReceiptNotesPar";
}
section.AddParagraph(); // add empty line for spacing
var emptyPar = section.AddParagraph(); // add empty line for spacing
emptyPar.Tag = "EmptyParagraph";
// now add the image
var lowerName = fileName.ToLower();
var isPDF = lowerName.EndsWith(".pdf");
@@ -807,23 +875,26 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
filePath = convertedOutputPath;
LogInfo(string.Format("Saved adjusted image to JPEG; file path is now {0}", filePath));
}
// do some calculations...
// render up to now on this page and get height remaining in inches
var currPageCount = pdfRenderer.DocumentRenderer.FormattedDocument?.PageCount;
var heightForExistingItemsOnPage = GetExistingPageItemHeight(pdfRenderer, footerParagraphHeight);
var remainingHeightInches = pageHeight - (2 * margin) - heightForExistingItemsOnPage;
var remainingHeightPixels = (remainingHeightInches * imageResolution) - imageInsertMarginPixels;
// write to PDF
var paragraph = section.AddParagraph();
paragraph.Format.Alignment = ParagraphAlignment.Center;
var image = paragraph.AddImage(filePath);
const int imageResolution = 72;
image.Resolution = imageResolution; // dots per inch
paragraph.Tag = "ImageParagraphTag";
//
//var maxItemPxWidth = ((pageWidth - (2 * margin)) * imageResolution) - 20;
//var maxItemPxHeight = ((pageHeight - (2 * margin)) * imageResolution) - 20;
//Console.WriteLine("Max width test: {0}; height: {1}", maxItemPxWidth, maxItemPxHeight);
image.Tag = "ReceiptImageTag";
paragraph.Tag = "ReceiptImageParagraphTag";
image.LineFormat = imageLineFormat.Clone();
// image.LockAspectRatio = true;
while (loadedImageHeight > 600 || loadedImageWidth > 550)
// resize down until it will fit on the page
while (loadedImageHeight > remainingHeightPixels || loadedImageWidth > maxItemPxWidth)
{
// Console.WriteLine("Image height = {0}, width = {1}; decreasing size by 5% to h={2}, w={3}", loadedImageHeight, loadedImageWidth, (uint)Math.Floor(loadedImageHeight * 0.95), (uint)Math.Floor(loadedImageWidth * 0.95));
// keep reducing size by 10% until it fits on the page
// keep reducing size by 5% (little by little) until it fits on the page
// ...might skew ever so slightly but should not be noticable...
loadedImageHeight = (uint)Math.Floor(loadedImageHeight * 0.95);
loadedImageWidth = (uint)Math.Floor(loadedImageWidth * 0.95);
}
@@ -917,13 +988,10 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
LogInfo(string.Format("Added image: {0} ({1})", file.Title, filePath));
hasAddedData = true;
}
var pdfRenderer = new PdfDocumentRenderer
{
Document = pdfDoc,
WorkingDirectory = folderPath
};
LogInfo("Rendering document to PDF file...");
pdfRenderer.DocumentRenderer.PrepareDocument(); // needed if you make edits after first PrepareDocument() is called
pdfRenderer.RenderDocument();
// actually save to disk now
string outputPDFFilePath = Path.Join(outputDir, outputFileName);
LogInfo("Saving PDF document to disk...");
pdfRenderer.PdfDocument.Save(outputPDFFilePath);